With this example we are going to demonstrate how to get the size of a LinkedHashMap, that is the number of key-value mappings in this LinkedHashMap. In short, to get the size of a LinkedHashMap you should:
- Create a new LinkedHashMap.
- Populate the linkedHashMap with elements, with
put(K key, V value)API method of LinkedHashMap. - Invoke
size()API method of LinkedHashMap. It returns the int number of key-value pairs that the linkedHashMap contains.
Let’s take a look at the code snippet that follows:
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 | package com.javacodegeeks.snippets.core; import java.util.LinkedHashMap; public class SizeLinkedHashMap { public static void main(String[] args) { // Create a LinkedHashMap and populate it with elements LinkedHashMap linkedHashMap = new LinkedHashMap(); linkedHashMap.put("key_1","value_1"); linkedHashMap.put("key_2","value_2"); linkedHashMap.put("key_3","value_3"); // int size() operation returns the number of key value pairs stored in LinkedHashMap System.out.println("Size of LinkedHashMap : " + linkedHashMap.size()); }} |
Output:
Size of LinkedHashMap : 3
This was an example of how to get the size of a LinkedHashMap in Java.
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